MongoParseError: options poolsize, usenewurlparse are not supported

Question

I get the error "MongoParseError: options poolsize, usenewurlparse are not supported" when I run "nodemon server".

Here the code for setting up the mongodb connection:

import app from "./server.js"
import mongodb from "mongodb"
import dotenv from "dotenv"

dotenv.config()
const MongoClient = mongodb.MongoClient

const port = process.env.PORT || 8000

MongoClient.connect(
  process.env.RESTREVIEWS_DB_URI,
  {
    poolSize: 50,
    wtimeout: 2500,
    useNewUrlParse: true,
    }
  )
  .catch(err => {
   
    console.error(err.stack)
    process.exit(1)
  })
  .then(async client => {
   
    app.listen(port, () => {
      console.log(`listening on port ${port}`)
    })
  })

Answer 1

Some of the MongoClient options have been deprecated.

MongoClient.connect(
    process.env.RESTREVIEWS_DB_URI,
    {
        maxPoolSize: 50, 
        wtimeoutMS: 2500,
        useNewUrlParser: true
    }

).catch(err => {
    console.error(err.stack)
    process.exit(1)
}

Answer 2

The version stopped supporting poolsize,wtimeout and useNewUrlParse.Replace your code with my edit.

import app from "./server.js";
import mongodb from "mongodb"
import dotenv from "dotenv"
dotenv.config()
const MongoClient = mongodb.MongoClient

const port = process.env.PORT || 8000

MongoClient.connect(
    process.env.RESTREVIEWS_DB_URI,
    {
        maxPoolSize:50,
        wtimeoutMS:2500,
        useNewUrlParser:true
    }
)
.catch(err => {
    console.error(err.stack)
    process.exit(1)
})
.then(async client => {
    app.listen(port, () => {
        console.log('listening on port '+port)
    })
})

Answer 3

const mongoose = require('mongoose');
require('dotenv').config();
const user = process.env.mongoUser;
const pass = process.env.mongoPass;
const url = `mongodb+srv://${user}:${pass}@cluster0.asqnt.mongodb.net/MyDB`;

mongoose.connect(url, {
    useNewUrlParser: true,
    useUnifiedTopology: true,
    useCreateIndex: true
})
.then(console.log('connecting'))
.catch(err => console.log(`error: ${err}`))

Answer 4

After changes in MongoDB-native diver to 4.x, you need to just change MongoClientOptions interface:

you have this:

MongoClient.connect(
  process.env.RESTREVIEWS_DB_URI,
  {
    poolSize: 50, // maxPoolSize
    wtimeout: 2500, // wtimeoutMS
    useNewUrlParse: true, // feel free to remove, no longer used by the driver.
    }
  )

you need:

MongoClient.connect(
  process.env.RESTREVIEWS_DB_URI,
  {
    maxPoolSize: 50,
    wtimeoutMS: 2500,
  }
)